Improved aerial sound device. An assembly consisting of an airship, such as a helicopter, light aircraft, airship, or balloon, is claimed with this title, in which a team composed of: - a small diesel engine (no. 9, figure 1) - an electric generator or dynamo (nº 8, figure 1) - a set of several electric batteries of 12 volts each (nº 7, figure 1) - a sound cassette cassette, or tape cassette (nº 6, figure 1) - an equalizer (nº 5, figure 1) - a set of two or more sound amplifiers: one amplifier for each speaker (nº 4, figure 1). On the outside of the airship, precisely under its fuselage (no. 1, figure 1), or on its lower sides, are installed: - a team of two or more loudspeakers or horns of great sound power (nº 3, figure 1), placed vertically and with their mouths facing downwards. - a sound reflecting screen (nº 2 figure 1). The operation of all that set is as follows: The diesel engine (no. 9, figure 1) drives the electric generator (no. 8, figure 1), producing an electric current that is conveniently adapted to the series of electric batteries (no. 7, figure 1), so that these accumulate enough electrical energy for the continued electrical consumption of the remaining aforementioned audio equipment, without the need for that electricity consumption to be made at the expense of the batteries of the airship, which would not be advisable. Once that independent power source is available inside the airship, it is transmitted to the cassette sound board (nº 6 figure 1) for its operation. It is also transmitted to the equalizer (no. 5, figure 1), to the amplifiers (no. 4, figure 1), and also to the loudspeakers (no. 3, figure 1), so that all elements or devices perform their normal functions, which are: the sound board that is recorded on your cassette, or on the aforementioned tape, that sound may be a speech, and also any music. That sound is, in turn, graduated in its bass and treble tones by the equalizer. Then the resulting sound is electrically transmitted to the amplifiers, which, being of the appropriate capacity, increase that sound power in an extraordinary proportion. And finally, that acoustic power reaches the powerful speakers, which throw it into the air, already in the form of sound. In this particular case, this volume of sound can reach the measurement of 80 decibels. And this is the one necessary to reach the earth clearly from a height of about 1,000 meters, covering a circle of approximately 250 meters in diameter. Naturally, all said devices will be properly connected to each other by the corresponding cables. The power of that sound will be graduated so that it arrives at ground with the right sound volume so that it is perfectly understood by those who looigan, but without it coming to thunder. This measurement of the sound volume will be given depending on the height of the airship and the place of land to which it is destined, being smaller for the field, open spaces and small localities, and larger (stronger) for the big cities with a lot of noise of their own, since this will neutralize, in a certain proportion, the arrival from the heights. The requirement that the aircraft fly 1,000 meters high is due to the fact that at that distance its engine (especially in the case of being light ships) is no longer audible practically from the ground, in addition to the sound of the speakers themselves. They will neutralize. If the ship were to fly to a much higher altitude, it would be necessary to increase the power of all the components of the public address system, which would increase its weight and volume in such a way that it would technically and economically prohibit the practice of this device. Since the number of decibels that will come out of those speakers will be very high and deafen the immediate crew of the airship, these will be fitted with headphones specially calculated to protect their ears, similar to those used by pilots of warplanes, astronauts, and the servants of the great pieces of artillery. To counteract part of that immediate noise will be placed under the fuselage of the airship (no. 1, figure 1) and over the speakers, a screen (no. 2, figure 1) curved downward, material refractory to sound, which will force that the volume of sound does not rise so freely and, at the same time, it will contribute that, by reflection, it goes more directly downwards. Although all the aforementioned components of this public address system can be installed on any airship, it will be more practical to place them in helicopters because they can be stopped in the air, and also move slowly, which significantly facilitates their goal of covering a area for a long time, or to reach to cover large areas of land without emitting what is heard continuously by many people. (Machine-translation by Google Translate, not legally binding)